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Income Taxes (Tables)
 6 Months Ended
Jun. 30, 2017
Income Tax Disclosure [Abstract]  
Reconciliation of Income Tax Expense
The table below provides a reconciliation of income tax expense computed at the federal statutory income tax rate to the income tax provision:
 
Three months ended June 30,
 
Six months ended June 30,
(in millions)
2017
 
2016
 
2017
 
2016
Edison International:
 
 
 
 
 
 
 
Income from continuing operations before income taxes
$
335

 
$
259

 
$
687

 
$
591

Provision for income tax at federal statutory rate of 35%
117

 
91

 
241

 
207

Increase in income tax from:
 
 
 
 
 
 
 
State tax, net of federal benefit
6

 
4

 
16

 
11

Property-related1
(83
)
 
(138
)
 
(196
)
 
(217
)
Change related to uncertain tax positions
(6
)
 
2

 
(18
)
 
1

Shared-based compensation2
(3
)
 
(4
)
 
(46
)
 
(15
)
Other
(5
)
 
(6
)
 
(11
)
 
(11
)
Total income tax expense (benefit) from continuing operations
$
26

 
$
(51
)
 
$
(14
)
 
$
(24
)
Effective tax rate
7.8
%
 
(19.7
)%
 
(2.0
)%
 
(4.1
)%
SCE:
 
 
 
 
 
 
 
Income from continuing operations before income taxes
$
395

 
$
317

 
$
787

 
$
683

Provision for income tax at federal statutory rate of 35%
138

 
111

 
275

 
239

Increase in income tax from:
 
 
 
 
 
 
 
State tax, net of federal benefit
9

 
6

 
22

 
15

Property-related1
(83
)
 
(138
)
 
(196
)
 
(217
)
Change related to uncertain tax positions
—

 
(1
)
 
(11
)
 
(2
)
Shared-based compensation2
(1
)
 
(3
)
 
(9
)
 
(11
)
Other
(6
)
 
(7
)
 
(12
)
 
(14
)
Total income tax expense (benefit) from continuing operations
$
57

 
$
(32
)
 
$
69

 
$
10

Effective tax rate
14.4
%
 
(10.1
)%
 
8.8
 %
 
1.5
 %
1  
During the second quarter of 2016, SCE recorded $79 million for 2012 – 2014 incremental tax benefits related to repair deductions, which were flowed-through to customers ($133 million pre-tax).
2 
Includes state taxes for Edison International and SCE of $4 million and $1 million, respectively, for the three months ended June 30, 2017 and $10 million and $2 million, respectively, for the six months ended June 30, 2017. Includes state taxes for Edison International and SCE of $3 million and $2 million, respectively, for the six months ended June 30, 2016. Refer to Note 1 for further information.
Reconciliation of Unrecognized Tax Benefits
 The following table provides a reconciliation of unrecognized tax benefits for 2017 as a result of the audit settlement:
(in millions)
Edison International
 
SCE
Balance at January 1, 2017
$
471

 
$
371

Tax positions taken during the current year:
 
 
 
   Increases
20

 
20

Tax positions taken during a prior year:
 
 
 
   Increases
3

 
3

   Decreases
—

 
—

   Decreases for settlements during the period
(83
)
 
(78
)
Balance at June 30, 2017
$
411

 
$
316